There are certain traits that you might not expect to be genetic. One of those things being sneezing when you see bright lights. Although it is harmless, it is a very interesting trait to have and also pretty common. This symptom comes from the Photic sneeze reflex which is known as ACHOO syndrome.
ACHOO syndrome is inherited in an autosomal dominant manner. This means that there only needs to be one mutated gene. If one parent has this trait, there is a 50% likely chance that their child will have this trait as well. Although it is not known what directly what causes this because sneezing as we know it is due to infections or irritants, but bright lights will not classify as either of those things. But it is a common thig. In fact, almost 15% to 30% of people sneeze due to light exposure. Studies show that this trait is mostly seen in Caucasian females.
If you notice that you sneeze due to light exposure or specifically if you look up at the sun, there is not needed to panic. it is a common, harmless trait to have. If you do sneeze in light, some recommend doing an experiment with your family in order to see if they will sneeze as well. It should not come as if either of your parents do this because it is inherited!
Links:
ACHOO Syndrome - Medical Genetics Summaries - NCBI Bookshelf
Why Does the Sun Make Some People Sneeze? - FOCUS
I had no idea sneezing due to light was genetic, or even the reason I sneeze so much! It is good to know it's harmless and not a sign of anything bigger. It makes you wonder what other tiny things we don't usually give thought are also inherited.
ReplyDeleteThis is so intriguing to learn that looking at light and then sneezing can possibly be a genetic trait. I remember when I was younger, some people would say to look at the light in order to sneeze but I just brushed it off as a myth. Now finding out that it is genetic and can be true for some people is so interesting.
ReplyDeleteVery interesting. I heard this as a kid and just figured that it was some common myth but to know that it has some scientific backing is really cool.
ReplyDeleteThis is something that has plagued me for my entire life and finally having an answer is so satisfying. I have read theories about how it's linked to cave men and how dispelling germs outside of your home was better than inside but no real evidence supports that one.
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